Method and Apparatus for Transmitting/Receiving Signal by Using Variable Band Width in Communication System

2. The operation method according to claim 1, wherein the first configuration information includes a starting guard RB (G-RB) index and an ending G-RB index of each of the one or more guard bands, and when N guard bands are configured, a number of pairs of the starting G-RB index and the ending G-RB index, which are included in the first configuration information, is N, and N is an integer equal to or greater than 1.

3. The operation method according to claim 2, wherein a number of the plurality of RB sets configured within a bandwidth part (BWP) of the unlicensed band is N+1.

4. The operation method according to claim 1, wherein a number of RBs included in each of the plurality of RB sets is a number of RBs located between adjacent guard bands.

6. The operation method according to claim 1, wherein the second configuration information is a bitmap, and the bitmap is included in downlink control information (DCI).

8. The operation method according to claim 7, wherein the first configuration information includes a starting guard RB (G-RB) index and an ending G-RB index of each of the one or more guard bands, and when N guard bands are configured, a number of pairs of the starting G-RB index and the ending G-RB index, which are included in the first configuration information, is N, and N is an integer equal to or greater than 1.

9. The operation method according to claim 8, wherein a number of the plurality of RB sets configured within a bandwidth part (BWP) of the unlicensed band is N+1, and a number of RBs included in each of the plurality of RB sets is a number of RBs located between adjacent guard bands.

10. The operation method according to claim 7, wherein the second configuration information is a bitmap, and the bitmap is included in downlink control information (DCI).

11. The operation method according to claim 7, further comprising transmitting, to the terminal, third configuration information of a control resource set (CORESET) configured in the unlicensed band and fourth configuration information of a search space configured in the unlicensed band, wherein the third configuration information is commonly applied to the plurality of RB sets, and a number of RBs in which the CORESET is disposed is equal to or less than a number of RBs belonging to one RB set.

12. The operation method according to claim 11, wherein the third configuration information includes an offset indicating a position of the CORESET in a frequency axis, and the offset indicates a difference between a starting RB of the unlicensed band and a starting RB of the CORESET.

13. He operation method according to claim 11, wherein the search space associated with the CORESET is repeated in the plurality of RB sets, and the fourth configuration information includes a field indicating whether the search space is configured in each of the plurality of RB sets.

15. The terminal according to claim 14, wherein the first configuration information includes a starting guard RB (G-RB) index and an ending G-RB index of each of the one or more guard bands; when N guard bands are configured, a number of pairs of the starting G-RB index and the ending G-RB index, which are included in the first configuration information, is N; a number of the plurality of RB sets configured within a bandwidth part (BWP) of the unlicensed band is N+1; and N is an integer equal to or greater than 1.

16. The terminal according to claim 14, wherein the second configuration information includes an offset indicating a position of the CORESET in a frequency axis, and the offset indicates a difference between a starting RB of the unlicensed band and a starting RB of the CORESET.

17. The terminal according to claim 14, wherein the search space associated with the CORESET is repeated in the plurality of RB sets, and the third configuration information includes a field indicating whether the search space is configured in each of the plurality of RB sets.